Luke Bryan Opens Up About Blake Shelton and Gwen Stefani: 'They're Having Fun and That's a Good Thing'

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Luke Bryan always has Blake Shelton's back!

Bryan opened up about his longtime pal in an interview with Entertainment Tonight at the American Music Awards red carpet on Sunday, and revealed what he thinks of Shelton's new, high-profile relationship with Gwen Stefani.

Asked whether he laughs at the headlines splashed across grocery aisle tabloids, Bryan couldn't help but poke fun at his buddy. "I laugh at how the hell he scored Gwen," the 39-year-old country star said with a cheeky grin. "What I love is the thing that came out, that she didn't know who the hell he was before The Voice. I was like, 'Well, she was lucky back then.'"

WATCH: Gwen Stefani Says She 'Never Heard Of' Blake Shelton Before She Joined 'The Voice' 

But in all seriousness, Bryan is fully supportive of Hollywood's hot new couple. In fact, he’s expected to sit with Stefani in the front row during the ceremony.

"The whole thing with relationship is enjoy it and have fun," he said. "They're having fun and that's a good thing."

Bryan will hit the stage during Sunday's awards show, airing live on ABC. He'll debut his brand new single, "Home Alone Tonight," alongside Little Big Town's Karen Fairchild.

"This is my first duet on stage," he told ET, admitting that he was feeling a little "jumpy" and "edgy."

WATCH: Find Out Where Luke Bryan, Gwen Stefani and More Will Sit During the 2015 AMAs

"Karen and Little Big Town, they've been on tour a lot," he explained. "We didn't get to rehearse last night so we've been kinda makeshift rehearsing today."

ET was with Bryan and Shelton earlier this year at the 50th anniversary of the Academy of Country Music Awards, where the pair was once again tackling co-hosting duties. Get a look at their hilarious bromance in the video below.